instr_util.h

/*
instr_util.h

Copyright (C) 2015 Juha Aaltonen

This file is part of standalone gdb stub for Raspberry Pi 2B.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef INSTR_UTIL_H_
#define INSTR_UTIL_H_

// gets high half word as signed int
int instr_util_shgethi(unsigned int val);
// gets low half word as signed int
int instr_util_shgetlo(unsigned int val);
// sign-extends the lower short in unsigned int to signed integer
int instr_util_signx_short(unsigned int val);
// sign-extends the lowest byte in unsigned int to signed integer
int instr_util_signx_byte(unsigned int val);
// stuffs two signed shorts into high and low half words of an unsigned int
unsigned int instr_util_ustuffs16(int val1, int val2);
// stuffs two unsigned shorts into high and low half words of an unsigned int
unsigned int instr_util_ustuffu16(unsigned int val1, unsigned int val2);
// stuffs four unsigned bytes into an unsigned int
unsigned int instr_util_ustuffu8(unsigned int byte3, unsigned int byte2, unsigned int byte1, unsigned int byte0);
// stuffs four signed bytes into an unsigned int
unsigned int instr_util_ustuffs8(int byte3, int byte2, int byte1, int byte0);
// saturate unsigned integer
unsigned int instr_util_usat(int val, unsigned int bitc);
// saturate signed integer
int instr_util_ssat(int val, unsigned int bitc);
// saturate signed long long integer
long long int instr_util_lssat(long long int val, unsigned int bitc);
// right-rotate bytes of an unsigned integer
unsigned int instr_util_rorb(unsigned int val, int count);
// swap half words of an unsigned integer
unsigned int instr_util_swaph(unsigned int val);
#endif /* INSTR_UTIL_H_ */